Table of Contents

spa30x-50x-51x-relnote-7-6-2-SR4

Release Notes for Cisco Small Business SPA30X, SPA50X, and SPA51X IP Phone Firmware Release 7.6(2)SR4

First Published: April 18, 2018

Introduction

This document describes the updates and fixes in Cisco Small Business SPA30X, SPA50X, and SPA51X IP Phone Firmware Release 7.6(2)SR4.

As with any firmware release, read these release notes before you upgrade the firmware. We also recommend that you back up the configuration before you perform any firmware upgrade.

Before You Upgrade

Firmware Release Installed on Your Phone

Special Instructions for Upgrading to Release 7.5.3 or Later

7.5.2b or later

None

7.5.1

Upgrade to 7.5.2b first, then upgrade to 7.5.3 or later.

7.4.x

7.3.x

Software Compatibility

Firmware Release 7.6(2)SR4 includes all customer-found defects that have been fixed after firmware release 7.6(2)SR3. For SPA5x5, the openssl upgrades to openssl-0.9.8zh.

New and Changed Features

There are no new or changed features in this release.

Caveats

This section describes the resolved and open caveats, and provides information on accessing the Cisco Software Bug Toolkit.

Access Cisco Bug Search

Known problems (bugs) are graded according to severity level. These release notes contain descriptions of the following:

- All severity level 1 or 2 bugs

- Significant severity level 3 bugs

You can search for problems by using the Cisco Bug Search.

Before You Begin

To access Cisco Bug Search, you need the following items:

- Internet connection

- Web browser

- Cisco.com user ID and password

Procedure

Step 1 To access the Cisco Bug Search, go to:

https://tools.cisco.com/bugsearch

Step 2 Log in with your Cisco.com user ID and password.

Step 3 To look for information about a specific problem, enter the bug ID number in the Search for field, then press Enter.

Open Caveats

There are currently no open defects for the Cisco Small Business SPA30X, SPA50X, and SPA51X for Firmware Release 7.6(2)SR4.

Resolved Caveats

The following table lists severity 1, 2, and 3 defects that are resolved for the Cisco Small Business SPA30X, SPA50X, and SPA51X for Firmware Release 7.6(2)SR4.

For more information about an individual defect, search for the caveat in the Bug Search Toolkit. You must be a registered Cisco.com user to access this online information.

Because defect status continually changes, the table reflects a snapshot of the defects that were resolved at the time this report was compiled. For an updated view of resolved defects, access Bug Toolkit as described in Access Cisco Bug Search.

Identifier

Headline

CSCvb27688

VxWorks DHCP and DNS Vulnerabilities - SPA300 - SPA500

CSCvd80726

"MBUF OVFL" issue when a NOTIFY hits the phone

CSCve37726

SPA 50x phones 'SUBSCRIBE' Not working with Huawei SBC

CSCvf56421

Intermittently provisioning rule resync period takes longer to contact server

Behavior During Times of Network Congestion

Anything that degrades network performance can affect voice and video quality, and in some cases, can cause a call to drop. Sources of network degradation can include, but are not limited to, the following activities:

- Administrative tasks, such as an internal port scan or security scan

- Attacks that occur on your network, such as a Denial of Service attack

To reduce or eliminate any adverse effects to the devices, schedule administrative network tasks during a time when the devices are not being used or exclude the devices from testing.

Related Documentation

Cisco Small Business

For more information on Cisco Small Business, see https://www.cisco.com/smb.

Cisco Small Business Product Documentation

For more information on Cisco Small Business SPA500 Series IP Phones, see https://www.cisco.com/c/en/us/products/collaboration-endpoints/small-business-spa500-series-ip-phones/index.html.

For more information on Regulatory Compliance and Safety Information for the Cisco SPA300 Series and Cisco SPA500 Series IP Phones, see

https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/csbpipp/ip_phones/regulatory_compliance/guide/rcsi_SPA300_SPA500.pdf.

Additional Information

For more information on Cisco Small Business Support Community, see https://supportforums.cisco.com/community/5541/small-business-support-community.

For more information on Cisco Small Business Support, see https://supportforums.cisco.com/community/3226/small-business-support-service.

For downloading the software, see https://software.cisco.com/download/navigator.html.

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a service request, and gathering additional information, see What’s New in Cisco Product Documentation at: https://www.cisco.com/c/en/us/td/docs/general/whatsnew/whatsnew.html.

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks . Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1721R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

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